release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/pnx833x/common/prom.c

   1 /*
   2  *  prom.c:
   3  *
   4  *  Copyright 2008 NXP Semiconductors
   5  *        Chris Steel <chris.steel@nxp.com>
   6  *    Daniel Laird <daniel.j.laird@nxp.com>
   7  *
   8  *  Based on software written by:
   9  *      Nikita Youshchenko <yoush@debian.org>, based on PNX8550 code.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25 #include <linux/init.h>
  26 #include <asm/bootinfo.h>
  27 #include <linux/string.h>
  28
  29 void __init prom_init_cmdline(void)
  30 {
  31         int argc = fw_arg0;
  32         char **argv = (char **)fw_arg1;
  33         char *c = &(arcs_cmdline[0]);
  34         int i;
  35
  36         for (i = 1; i < argc; i++) {
  37                 strcpy(c, argv[i]);
  38                 c += strlen(argv[i]);
  39                 if (i < argc-1)
  40                         *c++ = ' ';
  41         }
  42         *c = 0;
  43 }
  44
  45 char __init *prom_getenv(char *envname)
  46 {
  47         extern char **prom_envp;
  48         char **env = prom_envp;
  49         int i;
  50
  51         i = strlen(envname);
  52
  53         while (*env) {
  54                 if (strncmp(envname, *env, i) == 0 && *(*env+i) == '=')
  55                         return *env + i + 1;
  56                 env++;
  57         }
  58
  59         return 0;
  60 }
  61
  62 void __init prom_free_prom_memory(void)
  63 {
  64 }